public class StringConcat {
    public static void main(String[] args) {

        System.out.println("\u44e4");//!!!

        int a = 10;

        String str = "a的值是";
        str = str + a;
        System.out.println(str);

        String s2 = "a的值是";
        System.out.println(s2 + a);
        System.out.println(s2);

        int b = 20;
        int c = a + b;
        System.out.println("a + b= " + c);

        boolean aBiggerThanB = a > b;
        System.out.println("a > b 是 " + aBiggerThanB + "的");

        System.out.println("a + b = " + a + b);// a b 此时相当于字符串拼接

        System.out.println("a + b =" + (a + b));

        System.out.println("a * b = " + a * b); // * 优先级大于 +


    }
}
